Conduit cleastee



' for the loosened dirtv and Patented Feb. 8, 1927..Y

@Umea Ygres vfr rf NICE# DANIEL McGONAGIiE, OFEVERETT, MASSACHUSETTS.

' Y colvnurrA CLEANER.

' y Application iled December or easily ruptured material, the cutting.

edges are so arranged as to. avoid injury to the surrounding wall ofthe conduit while efficiently cutting away the. compacted material which obstructs the passage. Furthermore, the device is so constructed as to yprovide means for effectively accumulating thek loosened dirt and permit its easy with drawal from the conduit, the cutter vhead be ing formed to provide rearward passages being combined with a dirt-collecting receptacle or container by` which the loosened dirt is collected and lremoved from the conduit.

These and other features of the invention.

v will be described in the following specification and willbe defined in the to. annexed. A Y l In theV accompanying drawings I have illustrated aV simple andconvenient construction and arrangement embodying the principles of this invention, iin which:'

Figure 1 yis a side elevation with the container shown in cross section.

claims here- Figure 2 is an enlarged detail side elevation of the cutter head.

Figure 3 is a front elevation of the cutter head. v v

Figure 4 is a front end elevation of the dirt-collecting container.

In the practice of this invention, according to the form illustrated, I provide a short cylindrical shank l, to whose forward end is secured the cutter head 2,` which is of Vflared or approximately frusto vconical form and cut through or notched peripherally through its larger diameter to provide ,longitudinal passage-ways 3 and form cutting teeth 4, whose forward faces are beveled to form, approximately radial cutting edges 4a, which project forward to dig into the mass of material accumulated in the conduit as the cutter is advanced through the conduit in the cleaning joperation. Preferably the outer ends of the teeth 4 are also bev-- eled, as shown at 4b, so that the cutter, as

a, 1925. semaine. 73,004.

viewed from front, has something pearance of a star-wheel.

,Y i' itunes Some distance tothe rear of the cutter head I provide a stop member which, in this Y case, is inthe form of a nut 5, threaded on ythe shank and, therefore, forming a stop for the container. which may have a slight longitudinal adjustment. v f

lBetween thes'top member 5` and the head 2 is loosely mounted on the shank a dirtcollecting container whicln V in the form shown, comprises .a cylindrical tube 9 to whose front end is. secured, by threaded engagement, a. cap l0 centrally perforated toV pass freely through it allow the shank l to and provided with surrounding `perfora- .tions 10a, through which the loosened dirt which cutter may enter the container. l e. At its rear end the container hasay similar threaded cap l1 without inletholes, such as 10a, in the forward cap. Y To lengthen the shank and form a long iiexible handle, I provide a loneitudinal shaft lor rod 7, preferably of wooda because of its flexibility, to whose forward endis pinnedv or secured .a coupling 'ferrule 6,.

The coupling ferrule is preferably inter nally threaded to receive the threaded rear end of the shank l, andto prevent rotative slip a cotter pin 8 may be inserted through the ferrule and the shank 1..

The actuating rody 7 may be connected to any suitable source of power, such as a pneumatic hammer, to impart ashort, rapid reciprocationl to the cutter. As the container 9 is loose on the cutter shank` it is free to remain at rest while the cutter is lpasses through vthe notches 3 in the hammering away the dirt. TheV loosened dirt, passing rearwardly through the notches 3, falls against the front face of the cap l0 and sifts through the apertures 10L into the interior of the container.V The stop member 5 will be set at a sufficient distance togive` the requisite amount of lost motion or freedom of movement between the cutter head and the container to permit the cutter to eat its way forward in the. conduit,vwhile allowing the container to advance with it without necessitating its participation in thev recip- Yrocating 'or hammering movement of the cutter. It will be observed that not only does the loose cylindrical member on the cutter head shank serve as a receptacle for collecting waste material, but it performs the ladditional important function of a. bearing guide for keeping` the cutter head centralized in the conduit or pipe.

A -What'l claim is:

l. A conduit cleaner embracing in its construction al longitudinal shank, an approximately frusto-conical cutting head secured to said shank with itsV larger end forward,

v:thelarger portion of said head being formed with a series of exterior longitudinally eX- tending il-shaped notches to form intermediate 'cutting teeth, said cutting teeth being provided with radial forwardly' exposed c cutting edges radiating from a common center, the oblique sidev faces of said teeth converging toward said peripheral notches to guide the loosened dirt rearwardly through peripheral portions of the cutter head.

2. A conduit cleaner embracing in itsconstruction a shank, an approximately frustoconical cutter-head secured to the forward end thereof and comprising a plurality of rigid teeth provided with forwardly expose-d radial cutting edges peripherally separated by intervening rearwardly extending notches, substantially as described. v

3. A conduit cleaner' embracing in its construction a shank, a cutter head secured thereto and having cutting'teeth and passages for the rearward passage Yof the dirt loosened by the cutter, and a tubular dirtcollecting contain'erlo'osely mount-ed on the shank rearwardly of the cutter, substantially as described.

4. A conduit 4cleaner embracing in its construction a shank, a star shaped cutter secured to the forward end of the. shankand having forwardly exposed cutting edges, a dirt-collecting container loosely mounted on the shank, the shank being provided with a stop member suthciently to the rear of the container to allow longitudinal play between the cutter and the container' lwhen the cutter ing receptacle loosely mounted on the shank rearwardly of the-cutter 4to permit limited reciprocation of the cutter independently of the receptacle.

G. A conduit cleaner embracing in its construction a shank, a cutter secured to its forward end, a dirt-collecting receptacle comprising front and rear centrally perforated end heads loosely mountedv on the shank, and al connecting tubular member, the front end head beingprovided with openings for the admission of dirt.

7. A conduit cleaner embracing in its construction a shank, a toothed cutter secured to the forward end thereof, a dirt-collecting receptacle loosely mounted on the shank behind the cutter and having dirt intake openings in its forward end, and an actuating rod detachably coupled to the rear end of the shank.

8.A A conduit cleaner embracing in its construction a shank, a toothed cutter secured to the forward end thereof, a dirt-collecting receptacle rearwardly of the cutter between forwardly and rearwardly disposed spaced stops to permit independent limited reciprocation of the cutter to vloosen the dirt in front of it, while causing theV receptacle to advance as the cutter works forward kin the conduit.

ln witness whereof, I have subscribed the' above specification.

DANIEL MCGONAGLE.

loosely mounted on'the shank. 

